Unfortunately you can't have the one without the other.
From a post by Dimensio here.
I submit five hypothesis regarding the origin of the first life forms.
a) Natural processes occuring entirely upon earth resulted in chains of self-replicating molecular strands that eventually became the first life forms.
b) Aliens from another planet and/or dimension travelled to this planet and -- deliberately or accidentally -- seeded the planet with the first life forms.
c) In the future, humans will develop a means to travel back in time. They will use this technology to plant the first life forms in Earth's past, making the existence of life a causality loop.
d) A divine agent of unspecified nature zap-poofed the first life forms into existence.
e) Any method other than the four described above led to the existence of the first life forms.
Evolution can proceed just fine with any of these five scenarios. Looks like you may be wrong.
I try to supplant my deficiencies with humor, wit and in the extreme, DRIPPING sarcasm